Amdocs Interview Questions (Technical and HR) For 2022

Are you interested in a career with AMDOCS? Are you curious about how to prepare for an AMDOCS interview and what you can do to stand out among other candidates? Here are some technical interview questions from industry experts to help you answer accurately during the interview and secure a bright future career at this tech giant.  

Basic Questions for AMDOCS Technical Interview

The technical interview questions with relevant answers below will help you prepare better for the complete recruitment process followed by AMDOCS. Additionally, these questions will help you in other business purposes for various development areas and strategizing.

1. What is the difference between .equals() and ==?

Notably, .equals() is the function of a primitive data object that is designed to be overridden in addition to checking object equality. Whereas the "==" operator evaluates and determines if the object handlers on the left and right are referring to the very same object in blocks of memory.

When you see the expression x.equals(y), it indicates that the references 'x' and 'y' are both holding objects of the same type. The expression 'x==y' indicates that the references 'x' and 'y' both point to the same item.

2. Which command is used to convert a FAT32 file system into an NTFS file system? 

CONVERT: /fs: NTFS is the command that has to be entered. The data will not be affected in any way by this. However, keep in mind that in order to convert an NTFS partition back to FAT32, you will need to reformat that partition and choose the FAT32 file system as the format for conversion.

3. What does data abstraction mean when talking about C++?

A key component of data abstraction is the selective disclosure of the absolute most pertinent information concerning the primitive type of data to the outside world, while simultaneously concealing the implementation or other background specifics.

4. What are some of the key differences between procedure-oriented programming and object-oriented programming?

In a programming language, the whole program is broken down into a series of smaller components known as a list of library functions. Object-oriented programming is a type of computer programming in which the overall program is broken down into several smaller components known as objects. The technique taken by procedural programming is called top-down. The bottom-up methodology is what is used in object-oriented programming.

5. What are the programming examples of different types of errors?

* Runtime errors

* Logic errors

* Compiler errors

* Syntax errors

* Errors in the interface

* Resource errors

* Mathematical errors 

6. Explain what type casting means in C++.

The technique of changing a variable from a primitive data type to another is referred to as type casting and is used extensively in the procedural programming approach in the language C++. During the process of typecasting, the program's compiler will automatically convert a primitive data type into another primitive data type based on what we want the program to accomplish. For example, if we assign a value that is an integer (int), the compiler will finally transform that int value into the float value.

This happens if we assign a float variable (floating point) with an integer value. The technique of casting gives programmers the ability to make implicit conversions explicit and to even forcibly perform a file-type conversion in circumstances that do not typically occur.

7. What is the difference between call by value and call by reference?

Call by value is a method for passing parameters that involve copying the values of specific parameters into the formal parameters of a function. The two sets of parameters are then saved in separate blocks of memory regions as part of the automatic memory management procedure. Any modifications performed within different library functions, on the other hand, will not be reflected in the real parameters of the caller. 

Since the real parameters and the formal parameters both refer to the same locations, any changes that are done inside the function are directly reflected in the specific parameters of a caller. This method is referred to as call by reference.  

8. What exactly do you mean by max heap?

Max heap is an example of a full binary tree. In this type of binary search tree, the value included in each internal node is either larger than or equal to the values contained in the child nodes. The mapping of the elements of a heap into an array is a simple process. If a node is given the index 'k', then the left child nodes are given the index '2k + 1', and the right child nodes are given the index '2k + 2'. 

9. What is the difference between malloc() and calloc()?

Library functions or routines are known as malloc and calloc and are responsible for a block of dynamic memory allocation for an effective database management system. In search time, this implies that blocks of memory are taken from the heap segment and allocated during the program's execution for improved database management systems.

The number of parameters that are utilized in malloc() and calloc(), as well as their initialization procedures and the default values that are returned, are different from one another. 

10. What is the difference between overloading and going over the limit?

Overloading is when a reference function has the same signature but a distinct definition, which is also known as function overloading.

Method overriding is when the definition of the base class or root class is altered in a derived class like a child class using the "Method Overriding" keyword. 

11. What sets a Java Development Kit (JDK) apart from a Java Virtual Machine (JVM)?

Java Development Kit, or JDK, is intended for use in the development process and it also incorporates an execution environment. JVM, on the other hand, is only memory in a runtime environment; as a result, you would not be able to use it to compile the source files that you have or for any file type conversion.

12. What exactly is the distinction between the null pointer and the void?

The position of null and void in three-dimensional space accounts for the distinction between these two terms for the concept of nothing. A null value is the same as nothing at all, whereas a void just occupies space. 

13. Explain the difference between types of errors?

Some of the common examples of errors include the following:

A syntax error is anything that is discovered by the compiler or the interpreter and it refers to the erroneous usage of the language itself for all library functions, including a file type conversion. For example, the expression ":" is not allowed in Python. Types of errors that occur during the execution of a program are referred to as runtime errors. 

Runtime errors are different from compile-time errors, which are found before you run any byte codes.

14. What exactly is meant by memory leak in C?

Memory leaks occur whenever a newly available block of memory is dynamically created but is not subsequently deallocated during a file type conversion. New blocks of memory may be made available in C programs by using the malloc or calloc library functions, while old blocks of memory can be reclaimed using the free function.

15. Can you explain what array pointers are?

A group of variables that are indexed, in which each variable is a pointer, is referred to as an array of pointers (referencing a location in a memory block). In the field of computer science, pointers are an essential tool for developing, using, and eventually deleting many sorts of data structures or file type conversion.

16. Explain a friend function and default constructors?

In object-oriented programming, a friend function is a function that receives the same access to private and protected data as methods of a particular wrapper class. A buddy function is sometimes referred to as a friend function. As friend functions are declared by the class that is giving access, it follows that friend functions are included in the wrapper class interface in the same way that methods are.

A function Object() { [native code] } is considered to be a default function Object() { [native code] } if it does not have any arguments or if it does have parameters, all of those parameters have default values. If there is not a user-defined function Object() { [native code] } for a wrapper class A and there has to be one, then the compiler will automatically declare a default function Object() { [native code] } with no parameters called A::A. 

17. Explain the concept of the time of heap.

The work involved in heap sort is the addition of the two steps, which take O(n) time for buildup and O(n log n) time to reduce each node in the sequence, even if they are non-leaf nodes. This results in a complexity of O. (n log n).

18. What exactly are flash memory, heap memory, memory at runtime, and unused memory?

Flash memory, also referred to as flash storage, is a form of nonvolatile memory that can delete data in sections known as blocks and rewrite data at the byte level. Flash memory can also be referred to by its other name, read-only memory (ROM).

The heap memory is a section of the dynamic memory allocation that has been allotted to JVM and is made available to all of the active threads within the application.

The memory required for a variable is automatically allocated by the compiler whenever the variable is declared. This practice is also referred to as passive dynamic memory allocation or dynamic memory allocation performed during the compilation process. After the execution of the program has begun, memory can be made available for data variables.

19. What are the different types of polymorphism?

Types of polymorphism:

• Subtype polymorphism (runtime) 
• Parametric polymorphism (overloading)
• Ad hoc polymorphism (compile-time) 
• Coercion polymorphism (casting)

20. What do you mean by a break statement?

Break statement is a command in Java that breaks the flow of the current loop within the system. Furthermore, it allows another statement that is in the queue to take the position and begin in Java.

21. Mention the differences between the list and the dictionary?

In C++, the term 'list' refers to a collection of different index value pairs, just like an array would. The term 'dictionary' indicates a hashed structure that contains many different key-value combinations.

22. What are general-purpose pointers?

In C, a pointer is referred to as a void pointer when it is not connected with any particular primitive type of data. It indicates the address of the variables that are stored in the storage and links to some data placed there. In some circles, it is also known as the general-purpose pointer.

23. Explain the meaning of the leap statement and the jump statement? 

Control statements, known as jumping statements, are used to shift control of the program's execution from one place in the program to another point in the program.

A loop in a computer program is a set of statements that continues to be carried out either for a certain amount of iterations or until certain criteria are satisfied.

24. What is the automatic garbage collection in the garbage collection process?

Automatic garbage collection involves inspecting the heap memory, determining which items are currently being utilized and what are not, and removing the things that are not being used.

25. What do you understand by abstract class and constructor argument?

The purpose of a function Object() { [native code] } is to initialize an object rather than to physically build the object. Constructors are also present in abstract and wrapper classes, as is common knowledge. Therefore, if we do not provide any constructors within the abstract class, JVM (Java Virtual Machine) would give the abstract class or wrapper class, a default function Object() { [native code] }.

26. What exactly are database triggers? Describe the wide varieties of them. How exactly do they function?

A trigger is a particular kind of stored procedure that is also activated in response to the occurrence of a certain event in the database server. When a user attempts to alter data employing a primitive type of data manipulation language (DML) event, DML triggers are executed.

27. What are the default file types and access specifiers?

Access specifiers determine the means through which members (attributes and methods) of a wrapper class can communicate with one another.

28. What exactly are SQL JOINS and what are some examples of user programs offered?

Accessing data from various databases in SQL based on the logical relationships that exist between those tables is the goal of the JOIN statement. JOINS are what are used to retrieve data from different tables in a database and then display the resulting dataset as its table.

29. What is the difference between an exception class and a static class?

The following describes the key distinctions between the class method and the static method: The initial parameter for a class method is the cls variable, but a static method does not require any particular argument. The class state may be accessed and modified by a class method, but a static method is unable to do either of those things.

30. Is the programming language Java entirely object-oriented?

Even though Java adheres to all four object-oriented ideas, basic data types are already declared in Java (which are not objects). You do not need to first create an instance of a static class in order to get access to its members.

31. Explain the use of external fragmentation in memory management?

Whenever there is sufficient total unused memory space to respond to all allocation requests, a phenomenon known as external fragmentation in memory management might take place. In this instance, the memory is not connected in any way. As a result, the memory contains many vacant blocks that are dispersed around the space, but they are inadequate to be assigned to other programs. The solution to the problem of external fragmentation is compaction.

32. ClassLoader, what exactly is it?

When a program is run in Java, ClassLoader is a component of Java Virtual Machine that is responsible for loading the associated class files. The ClassLoader component is the one that loads the executable file first.

Bootstrap, Extension, and Application ClassLoaders, are all available in Java.

33. What exactly is an association?

A connection that does not have ownership over another person or entity is referred to as an association. An individual, for instance, may have connections to more than one bank, and a bank may have connections to several different persons; nonetheless, neither party may own the other.

34. What is JDK?

One of the three most popular technology packages utilized in Java programming is known as Java Development Kit (JDK). JVM and JRE rely on JDK as an independent component in order to successfully execute Java applications. The Java platform specs may be implemented with the help of this implementation kit, which includes class libraries and compilers.

35. In Java, what exactly is a method?

A method is a section of code that is only executed when it is specifically requested to do so. A method accepts data, often known as parameters, which may be sent into it. Methods, which are frequently referred to as functions, are the means by which certain tasks may be carried out.

36. What exactly is an interface marker?

The term 'marker interface' refers to an empty interface in the Java programming language. Some well-known instances of a marker interface are the terms 'serializable' and 'cloneable'.

37. What does the term 'exception' mean in Java?

An occurrence that happens while a program is being executed and disturbs the regular flow of the instructions being carried out by the program is referred to as an exception.

In the event when an error occurs while a method is being executed, the method will generate an object and then pass it over to the runtime system. This object, which is known as an exception object, stores information on the error, such as the type of error that occurred and the state of the program at the time that the error occurred. The process of constructing an exception object and passing it on to the runtime system is referred to as throwing an exception.

38. In Java, can you explain what bytecode means?

Java programs are compiled into a format called bytecode once they are written. When a Java application has been compiled into bytecode, it is ready to be sent over a network so that it may be run on a Java Virtual Machine (JVM). The extension class is often appended to files containing bytes of code.

39. What exactly do you mean when you say JRE?

Java runtime environment, often known as JRE, is a set of software tools that is built specifically for the process of developing Java programs. This is included in JDK, although it may be downloaded on its own if desired. The primary responsibility for coordinating the actions class of the components lies with JRE.

40. What exactly is meant by the term 'object-oriented paradigm'?

The object-oriented paradigm (OOP) is a framework that centers on the idea of 'objects'. It consists of data as well as code. Both the data, which is presented in the form of fields, and the regulation, which is shown as processes, are presented here. The fact that the object's procedures are able to access and in many cases, edit the data fields themselves is one of the fascinating features of this paradigm.

41. Explain the difference between instance variables and local variables.

For example, variables are declared inside a class and the scope of those variables is restricted to just one particular object.

Within the confines of a method or other section of code, a local variable can be placed anywhere. In addition, the scope is confined to the portion of the block of code that contains the variable's declaration.

42. Which word comes after the last one in Java?

When defining values for variables, programmers in Java can use a predefined phrase called 'final' to indicate that the value is irreversible. When a value is defined using the final keyword, the value of the variable will not change while the program is being run. This will cause the value to be considered stable.

43. Can a function Object() { [native code] } return a value?

Yes, a function Object() { [native code] } can return a value. You cannot have a function Object() { [native code] } return a value directly; instead, it automatically replaces the instance of the class that is now active.

44. Describe the concept of method overloading in Java.

In Java, the technique of establishing several method signatures while using the same name for a single method is referred to as method overloading. Notably, method overloading may be accomplished in two methods, which are as follows:

• Changing the number of arguments being presented
• Modifying the kind of return that the method produces

45. Define late binding.

The method call and the code segment for the method are brought together through a process known as binding. Late binding is when the code segment of the method is unknown until it has been called during the runtime.

46. Why is it necessary to utilize generics in Java programming?

Utilizing generics is what provides type safety during the compilation process. Users are able to detect unneeded incorrect types during the compilation process. Thanks to compile-time type safety! Programmers are able to declare a single method declaration, a collection of related methods or types with the assistance of an accessible generic class declaration when using generic methods as well as wrapper classes.

47. What are the different sorts of primitive data?

In Java, the fundamental building blocks for manipulating data are known as primitive data types. These are the most fundamental sorts of data that may be stored in a Java program. The int, char, byte, float, double, long, and short data types, as well as the Boolean data type, make up the primitive data types.

48. Explain why reflection is a vital component of Java.

Methods, classes, and interfaces may be examined and altered at runtime using reflection. Notably, reflection in Java is a very useful feature. Reflection in Java enables us to evaluate types of classes like wrapper classes, interfaces, fields, and methods during runtime despite knowing what they have been named at compile time. Additionally, new objects and methods may be created with the use of reflection. In order to utilize user-defined wrapper classes, you must create extensible objects with their full-qualified names and use them in your applications. Students' private information could also be examined by debugging teams.

49. What does double brace initialization mean in the context of the Java programming language?

To combine two distinct processes, we use the Java phrase "double brace initialization." This is done using two sets of braces. As a result of the initial brace, a secret inner class is created. It is an initialization block within the second brace of code. It is called double brace initialization when both are used simultaneously.

It is a common practice to make use of this 'brace' pointer to maintain a reference to the outer class. A single statement may be used to create and initialize everything. Initializing collections is the most common application of this function. It streamlines the code and makes it easier to understand.

50. Define Java's JIT compiler.

JIT stands for Java's just-in-time compiler. The software aids in the direct transmission of Java bytecode toward the processor. As soon as a Java method is called, the JIT compiler kicks in, which is enabled by default in the language. Afterward, the JIT compiler translates the bytecode of the called method to the native machine code. JVM calls the compiled code of the method directly instead of interpreting it before the method has been compiled. As a result, it is frequently tasked with improving the runtime performance of Java programs.

Basic HR Interview Questions for AMDOCS

Here are some of the sample questions that you could be asked during your HR round at AMDOCS:

1. Explain why you have decided to leave your current professional career role.
2. What aspects of a new challenge are most appealing to you?
3. Please tell me about your background.
4. What attracts you to this particular job opportunity?
5. Why do you plan to resign from your current position?
6. Are you able to give an example of a time when you got something wrong at work?
7. Please share a story with me about a time when you had a disagreement with a coworker and how you handled the situation.
8. In what ways are you familiar with our company?
9. What suggestions do you have for enhancing the present quality of our product or service?
10. What kind of qualities does your present management see in you?

About AMDOCS 

AMDOCS is one of the best multinational corporations in the world and its employees call it a dream technology company. Established in 1982, its primary line of business is the distribution of software and the provision of services to digital businesses. Its mission is to enhance people's lives and society as a whole through innovative ideas and cutting-edge technology, making it a dream technology company for all. 

If you are looking for career progress or a path to begin your professional career on the right foot after college life, test your technical abilities, problem-solving abilities, and basic concepts around core Java with these interview questions. Join the company and learn about application servers, application development, complete concept of bug life, unique technical abilities, etc., to finish a complicated project with the current project framework but a newer approach.

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