Raksha Bandhan Wishes using HTML CSS & JavaScript
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JavaScript Interview Questions for Freshers
1. What are the different data types present in javascript?
2. Explain Hoisting in JavaScript.
3. Why do we use the word “debugger” in JavaScript?
4. Difference between “ == “ and “ === “ operators.
5. Difference between var and let keyword in JavaScript.
6. Explain Implicit Type Coercion in JavaScript.
7. Is JavaScript a statically typed or a dynamically typed language?
8. What is NaN property in JavaScript?
9. Explain passed by value and passed by reference.
10. What is an Immediately Invoked Function in JavaScript?
11. What do you mean by strict mode in JavaScript and characteristics of JavaScript strict-mode?
12. Explain Higher Order Functions in JavaScript.
13. Explain “this” keyword.
14. What do you mean by Self Invoking Functions?
15. Explain call(), apply() and, bind() methods.
16. What is the difference between exec () and test () methods in JavaScript?
17. What is currying in JavaScript?
18. What are some advantages of using External JavaScript?
19. Explain Scope and Scope Chain in JavaScript.
20. Explain Closures in JavaScript.
21. Mention some advantages of JavaScript.
22. What are object prototypes?
23. What are callbacks?
24. What are the types of errors in JavaScript?
25. What is memorization?
26. What is recursion in a programming language?
27. What is the use of a constructor function in JavaScript?
28. What is DOM?
29. Which method is used to retrieve a character from a certain index?
30. What do you mean by BOM?

C Programming Interview Questions
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Q #1) What are the key features in the C programming language?
Q #2) What are the basic data types associated with C?
Q #3) What is the description for syntax errors?
Q #4) What is the process to create increment and decrement statement in C?
Q #5) What are reserved words with a programming language?
Q #6) What is the explanation for the dangling pointer in C?
Q #7) Describe static function with its usage?
Q #8) What is the difference between abs() and fabs() functions?
Q #9) Describe Wild Pointers in C?
Q #10) What is the difference between ++a and a++?

Q #11) Describe the difference between = and == symbols in C programming?
Q #12) What is the explanation for prototype function in C?
Q #13) What is the explanation for the cyclic nature of data types in C?
Q #14) Describe the header file and its usage in C programming?
Q #15) There is a practice in coding to keep some code blocks in comment symbols than delete it when debugging. How this affects when debugging?
Q #16) What are the general description for loop statements and available loop types in C?
Q #17) What is a nested loop?
Q #18) What is the general form of function in C?
Q #19) What is a pointer on a pointer in C programming language?
Q #20) What are the valid places to have keyword “Break”?

Q #21) What is the behavioral difference when the header file is included in double-quotes (“”) and angular braces (<>)?
Q #22) What is a sequential access file?
Q #23) What is the method to save data in a stack data structure type?
Q #24) What is the significance of C program algorithms?
Q #25) What is the correct code to have the following output in C using nested for loop?
Q #26) Explain the use of function toupper() with an example code?
Q #27) What is the code in a while loop that returns the output of the given code?
Q #28) Select the incorrect operator form in the following list(== , <> , >= , <=) and what is the reason for the answer?
Q #29) Is it possible to use curly brackets ({}) to enclose a single line code in C program?
Q #30) Describe the modifier in C?

Q #31) What are the modifiers available in C programming language?
Q #32) What is the process to generate random numbers in C programming language?
Q #33) Describe the newline escape sequence with a sample program?
Q #34) Is that possible to store 32768 in an int data type variable?
Q #35) Is there any possibility to create a customized header file with C programming language?
Q #36) Describe dynamic data structure in C programming language?
Q #37) Is that possible to add pointers to each other?
Q #38) What is indirection?
Q #39) What are the ways to a null pointer that can be used in the C programming language?
Q #40) What is the explanation for modular programming?
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-: Top 50 Java interview questions :-

#1) What is JAVA?
#2) What are the features of JAVA?
#3) How does Java enable high performance?
#4) Name the Java IDE’s?
#5) What do you mean by Constructor?
#6) What is meant by the Local variable and the Instance variable?
#7) What is a Class?
#8) What is an Object?
#9)What are the OOPs concepts?
#10) What is Inheritance?
#11) What is Encapsulation?
12) What is Polymorphism?
#13) What is meant by Method Overriding?
#14) What is meant by Overloading?
#15) What is meant by Interface?
#16) What is meant by Abstract class?
#17) Difference between Array and Array List.
#18) Difference between String, String Builder, and String Buffer.
#19) Explain about Public and Private access specifiers.
#20) Difference between Default and Protected access specifiers.
#21) Difference between HashMap and HashTable.
#22) Difference between HashSet and TreeSet.
#23) Difference between Abstract class and Interface.
#24) What is the meaning of Collections in Java?
#25) What are all the Classes and Interfaces that are available in the collections?
26) What is meant by Ordered and Sorted in collections?
27) Explain the different lists available in the collection.
28) Explain about Set and their types in a collection.
29) Explain about Map and its types.
30) Explain the Priority Queue.
31) What is meant by Exception?
32) What are the types of Exceptions?
33) What are the different ways to handle exceptions?
34) What are the advantages of Exception handling?
35) What are the Exception handling keywords in Java?
36) Explain about Exception Propagation.
#37) What is the final keyword in Java?
38) What is a Thread?
39) How do you make a thread in Java?
40) Explain about join () method.
41) What does the yield method of the Thread class do?
42) Explain about wait () method.
#43) Difference between notify() method and notifyAll() method in Java.
#44) How to stop a thread in java? Explain about sleep () method in a thread?
#45) When to use the Runnable interface Vs Thread class in Java?
46) Difference between start() and run() method of thread class.
47) What is Multi-threading?
48) Explain the thread life cycle in Java.
49) What is Synchronization?
50) What is the disadvantage of Synchronization?

👆 Data Structures notes 👆