Infosys Java Lead Interview Questions and Answers for Experienced

Swap two numbers with and without temporary variable

• Without temporary variable: Use addition and subtraction

• With temporary variable: Use a third variable to store the value of one of the numbers

• Example without temporary variable: a=5, b=7; a=a+b; b=a-b; a=a-b;

• Example with temporary variable: a=5, b=7; temp=a; a=b; b=temp;

Performa is a performance monitoring tool for HPE 3PAR storage arrays.

• Performa provides real-time monitoring of storage performance metrics.

• It helps identify performance bottlenecks and optimize storage performance.

• Performa can generate reports and alerts based on user-defined thresholds.

• It can also be used for capacity planning and trend analysis.

• Examples of performance metrics monitored by Performa include IOPS, late

RAID stands for Redundant Array of Independent Disks. It is a data storage technology that combines multiple physical disks into a single logical unit.

• RAID provides improved performance, fault tolerance, and data protection.

• There are different levels of RAID, including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10.

• RAID 0 offers improved performance but no redundancy, while RAID 1 provides redundancy but no performance im...read more

FSMO stands for Flexible Single Master Operations. It is a role in Active Directory that controls specific domain-wide operations.

• There are five FSMO roles: Schema Master, Domain Naming Master, RID Master, PDC Emulator, and Infrastructure Master.

• Each FSMO role is responsible for a specific operation within the Active Directory domain.

• For example, the PDC Emulator role is responsible for time synchronization and passwor...read more

iDRAC stands for Integrated Dell Remote Access Controller. It is a hardware and software solution for remote server management.

• iDRAC allows administrators to remotely manage and monitor Dell servers.

• It provides features such as power management, virtual media access, and console redirection.

• iDRAC can be accessed through a web interface or command line interface.

• It is available on most Dell PowerEdge servers.

• iDRAC can b...read more

DNS stands for Domain Name System. It is a system that translates domain names into IP addresses.

• DNS is like a phonebook for the internet

• It helps to locate websites by translating domain names into IP addresses

• DNS servers store information about domain names and their corresponding IP addresses

• DNS can also be used for other purposes like email routing and network diagnostics

DHCP stands for Dynamic Host Configuration Protocol. It is a network protocol that automatically assigns IP addresses to devices on a network.

• DHCP is used to simplify network administration by automatically assigning IP addresses to devices on a network.

• It allows devices to join a network and obtain an IP address without manual configuration.

• DHCP servers can also provide additional network configuration information, su...read more