ECAT Computer Science MCQS Page 2
Which of the following data type offers the highest precisions
Unsigned long unit
Which is NOT a valid statement to initialize a variable?
char n =”hello World”;
cons int N=100;
Which variable should be used to store the value “I want an A in this exam”.
A candidate key is
A group attribute that can be the primary key
The primary key selected to be the key of relation
All of them
Which is NOT a rule for naming variables?
All the above
Use a descriptive name for the value
Start the name of variable with a letter
Use nothing but letters, digits, or the underscore character
An attribute that uniquely identify each row in a relation is called
Which is a valid statement for initializing of a variable?
All of these
int x=50, y=75;
Which of the following is used to separate each variable while declaring more than one variable on the same line?
Which term describes the kind of values that a variable can store?
Relational operators are used to
Compare two values
Establish a relationship among variables
Construct compound condition
Performs arithmetic operators
Which is a valid statement for declaring a variable?
The number of bytes used by long int data type in C is:
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