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1. Which of the following is not a valid C variable name?

• int number;
  

• float rate;
  

• int variable_count;
  

• int $main;

Which data structure is used for implementing recursion?

• a) Stack
  

• b) Queue
  

• c) List
  

• d) Array

All keywords in C are in ____________

• a) LowerCase letters
  

• b) UpperCase letters
  

• c) CamelCase letters
  

• d) None of the mentioned

The data structure required to check whether an expression contains a balanced parenthesis is?

• a) Queue
  

• b) Stack
  

• c) Tree

• d) Array

What is the value of the postfix expression 6 3 2 4 + – *?

• a) 74
  

• b) -18
  

• c) 22
  

• d) 40

The data structure required for Breadth First Traversal on a graph is?

• a) Array
  

• 
  b) Stack
  

• 
  c) Tree
  

• 
  d) Queue

What is a bit array?

• a) Data structure that compactly stores bits
  

• b) Data structure for representing arrays of records
  

• c) Array in which elements are not present in continuous locations
  

• d) An array in which most of the elements have the same value

8.Which algorithm is used in the top tree data structure?

• a) Backtracking
  

• 
  b) Divide and Conquer
  

• 
  c) Branch
  

• 
  d) Greedy

All keywords in Python are in _________

• a) Capitalized
  

• b) lower case
  

• c) UPPER CASE
  

• d) None of the mentioned

What will be the value of the following Python expression?

print(4 + 3 % 5)

• 7

• 2

• 4

• 3