CBSE Class 12 Computer Science — MCQs

Identify the output of the following code snippet : ```python s = "the Truth" print(s.capitalize()) ```

Which of the following expressions in Python evaluates to True ?

What is the output of the following code snippet ? ```python s='War and Peace by Leo Tolstoy' print(s.partition("by")) ```

If L is a list with 6 elements, then which of the following statements will raise an exception ?

Consider the statement given below : ```python f1 = open("pqr.dat","________") ``` Which of the following is the correct file mode to open the file in read only mode ?

What will be the output of the query ? ```sql SELECT MACHINE_ID, MACHINE_NAME FROM INVENTORY WHERE QUANTITY <= 100; ```

Which network device serves as the entry and exit point of a network, as all data coming in or going out of a network must first pass through it in order to use routing paths ?

What will be the output of the following code snippet ? ```python t = tuple('tuple') t2 = t[2], t += t2 print(t) ```

Which of the following statements is true about dictionaries in Python ?

What will be the output of the following code ? ```python def f1(a,b=1): print(a+b,end='-') c=f1(1,2) print(c,sep='*') ```

Which of the following SQL command can change the degree of the existing relation ?

Which aggregate function in SQL returns the smallest value from a column in a table ?

With respect to computer networks, which of the following is the correct expanded form of RJ 45 ?

For the academic purpose, the University will provide its own 24 x 7 FM channel within the University Campus. Which communication medium, out of the following, is used by FM ?

A table has two candidate keys, one of which is chosen as the primary key. How many alternate keys does this table have ?

A relation in MySQL database consists of 2 tuples and 3 attributes. If 2 attributes are deleted and 4 tuples are added, what will be the cardinality of the relation ?