Technical Questions asked in Practo

  1. The _________ determines the cause of the interrupt, performs the necessary processing and executes a return from the interrupt instruction to return the CPU to the execution state prior to the interrupt.
    1. interrupt request line
    2. device driver
    3. interrupt handler
    4. All of these
    Answer:  Option C.
  2. To create a file
    1. allocate the space in file system
    2. make an entry for new file in directory
    3. both (a) and (b)
    4. none of the mentioned
    Answer: Option  C.
  1. What flavor of Network Address Translation can be used to have one IP address allow many users to connect to the global Internet?
    1. NAT
    2. Static
    3. Dynamic
    4. PAT
    Answer: Option  D.
  2. You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server connected to the switch running 10Mbps half-duplex as well. How much bandwidth does each host have to the server?
    1. 100 kbps
    2. 1 Mbps
    3. 2 Mbps
    4. 10 Mbps
    Answer: Option  D.
  3. What will be output of following program?
    unsigned long int (* avg())[3]{
    static unsigned long int arr[3] = {1,2,3};
    return &arr;
    int main(){
    unsigned long int (*ptr)[3];
    ptr = avg();
    printf("%d" , *(*ptr+2));
    return 0;

    1. 1
    2. 2
    3. 3
    4. Compilation error
    Answer:  Option  C.
  4. Which join refers to join records from the right table that have no matching key in the left table are include in the result set:
    1. Left outer join
    2. Right outer join
    3. Full outer join
    4. Half outer join
    Answer: Option  B.

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