Question 21 : In what situation, install function returns NULL?
1. When there is no memory for adding new name
2. When the name to be defined is already present in the table
3. Whenever a new name is added to the table
4. All of the mentioned
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Question 22 : Which operator connects the structure name to its member name?
1. –
2. <-
3. .
4. Both <- and .
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Question 23 : Which of the following technique is faster for travelling in binary trees?
1. Iteration
2. Recursion
3. Both Iteration and Recursion
4. Depends from compiler to compiler
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Question 24 : Which of the following return-type cannot be used for a function in C?
1. char *
2. struct
3. void
4. none of the mentioned
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Question 25 : Which of the following are themselves a collection of different data types?
1. string
2. structures
3. char
4. all of the mentioned
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Question 26 : Which of the following is not possible regarding structure variable?
1. A structure variable pointing to itself
2. A structure variable pointing to another structure variable of same type
3. 2 different type of structure variable pointing at each other
4. None of the mentioned
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Question 27 : Which of the following statement is true?
1. Install function uses lookup
2. lookup function uses install
3. Install and lookup function work independently
4. None of the mentioned
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Question 28 : Which of the following operation is illegal in structures?
1. Typecasting of structure
2. Pointer to a variable of same structure
3. Dynamic allocation of memory for structure
4. All of the mentioned
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Question 29 : Presence of code like 's.t.b = 10' indicates __________
1. Syntax Error
2. Structure
3. double data type
4. An ordinary variable name
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Question 30 : Which of the following uses structure?
1. Array of structures
2. Linked Lists
3. Binary Tree
4. All of the mentioned
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